Can you think of any three-dimensional shape that comprises of exactly two surfaces?

What country can make you shiver?

What does a man do only once in his lifetime, but women do once a year after they are 29?

A father's child, a mother's child, yet no one's son.

Who am I?

Can you Find and name the hidden bird in the picture below ?

what does this picture(rebus) riddle means ?

Spot the cat in the picture below

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

You are an expert on paranormal activity and have been hired to locate a spirit haunting an old resort hotel. Strong signs indicate that the spirit lies behind one of four doors. The inscriptions on each door read as follows:

Door A: It's behind B or C
Door B: Its behind A or D
Door C: It's in here
Door D: It's not in here

Your psychic powers have told you three of the inscriptions are false, and one is true. Behind which door will you find the spirit?

You can hear me, but you can't touch or see me.

What am I?